Tait International Limited TBCK4B Manual Do Utilizador
DRAFT 4
TB9400 Installation and Operation Manual
Operation
43
© Tait Electronics Limited September 2011
3.2.3
PMU
The only controls on the PMU are the on/off switches on the rear panel for
the AC and DC modules, and the indicator LEDs visible through a slot in
its front panel.
the AC and DC modules, and the indicator LEDs visible through a slot in
its front panel.
Warning!!
The AC and DC module on/off switches do not
totally isolate the internal circuitry of the PMU
from the AC or DC power supplies. You must
disconnect the AC and DC supplies from the
PMU before dismantling or carrying out any
maintenance. Refer to the service manual for
the correct servicing procedures.
totally isolate the internal circuitry of the PMU
from the AC or DC power supplies. You must
disconnect the AC and DC supplies from the
PMU before dismantling or carrying out any
maintenance. Refer to the service manual for
the correct servicing procedures.
AC Module On/Off
Switch
Switch
This switch turns the AC input to the PMU on and off. Note that this
switch breaks only the phase circuit, not the neutral.
switch breaks only the phase circuit, not the neutral.
Note
On switches fitted to PMUs up to November 2008, the red button
is “in” when on, and “out” when off. On switches fitted from
November 2008 onwards, the red button remains “out” whether
on or off.
is “in” when on, and “out” when off. On switches fitted from
November 2008 onwards, the red button remains “out” whether
on or off.
Figure 3.5
Operating controls on the PMU
b
AC module on/off switch
d
indicator LEDs
c
DC module on/off switch
b
c
rear view
d
front view